Nathaniel J. Greeson

Partner
Washington, D.C. P: 202.719.8202 M: 615.364.5661 F: 202.347.1684
Legal Assistant
Tish Banks
P: 202.719.8210 tbanks@bradley.com
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Nathaniel Greeson is a government contracts partner in Bradley’s Washington, D.C. office. He represents contractors, grantees, and international companies in the full range of government procurement disputes and counseling matters, with particular depth in bid protests, contract claims and disputes, and federal grants and cooperative agreements.

Nathaniel's practice is distinguished by the breadth of forums in which he litigates and the range of clients he serves. He regularly represents both disappointed offerors and contract awardees in bid protests before the Government Accountability Office (GAO) and the U.S. Court of Federal Claims (COFC), and he prosecutes and defends contract claims before the Civilian Board of Contract Appeals (CBCA), the Armed Services Board of Contract Appeals (ASBCA), and in federal court. He also handles SBA size protests and NAICS appeals before the SBA Office of Hearings and Appeals (OHA) and advises on state and local procurement disputes nationwide.

A notable feature of Nathaniel's practice is his work with international companies seeking to do business with the U.S. government. He advises foreign companies on FAR and DFARS compliance, market entry strategy, FOCI considerations, and the legal and regulatory framework unique to foreign participation in federal procurement. His experience working directly with contracting officers, agency program officials, state and local officials, and agency finance officials gives him practical insight that few outside counsel can offer.

Nathaniel has been recognized by Best Lawyers: Ones to Watch (2021–2025), as a JD Supra Readers' Choice “Top 10 Author” for Government Contracting (2026), and as a member of Bradley's Law360 Government Contracts Practice Group of the Year team (2021, 2023, 2024, 2025). He is a prolific contributor to the BuildSmart blog and a frequent author on procurement law, enforcement trends, and regulatory developments affecting federal contractors and grantees.

Nathaniel focuses his practice in the following areas:

Bid Protests (GAO, COFC, Agency-Level)

  • Represents both protesters and intervenor-awardees in complex, high-value protests across all civilian and defense agencies
  • Extensive experience in protests involving other transaction authority (OTA), IDIQ task order awards, multiple-award contracts, and SBA set-aside programs
  • Handles state and local bid protests in multiple jurisdictions

Contract Claims & Disputes (CBCA, ASBCA, COFC)

  • Prepares and prosecutes requests for equitable adjustment (REAs) and certified claims
  • Defends contractors in government claims, terminations for default, and cost disallowance actions
  • Advises on constructive changes, differing site conditions, and delay and disruption claims

Federal Grants & Cooperative Agreements

  • Counsels grantees and cooperative agreement recipients on compliance, reporting, and audit requirements
  • Handles grant disputes, terminations, and agency appeals, including matters arising under USAID, HHS, DOE, and other major grant-issuing agencies
  • Advises nonprofits, universities, and for-profit recipients on 2 CFR Part 200 obligations and OIG investigations

International Companies Entering the U.S. Government Market

  • Guides allied foreign companies through FAR/DFARS compliance, SAM.gov registration, and domestic preference requirements (Buy American, TAA)
  • Advises on FOCI considerations and structures for foreign-owned companies pursuing DOD, IC and sensitive agency contracts
  • Experience with a broad range of international clients across defense technology, infrastructure, and professional services sectors

Compliance, Cybersecurity & Investigations

  • Counsels contractors on FAR/DFARS cybersecurity requirements, CMMC compliance, and cybersecurity breach reporting obligations
  • Advises on False Claims Act exposure and DOJ voluntary disclosure policy, internal investigations, and suspension and debarment proceedings
  • Experience managing and defending suspension and debarment matters

Prime/Subcontractor Matters

  • Drafts and negotiates teaming agreements, subcontracts, and NDAs
  • Resolves prime-sub disputes involving scope, payments, and flow-down obligations

Before joining Bradley, Nathaniel served as a senior litigation advisor in the Procurement and Fiscal Law Division of the DHS FEMA Office of Chief Counsel, where he litigated bid protests on behalf of the federal government before the GAO and the U.S. Court of Federal Claims, and handled appeals before the Civilian Board of Contract Appeals on behalf of FEMA. That experience gave him a first-hand understanding of how agencies evaluate proposals, make source selection decisions, and apply the standards that govern contractor claims — perspective that directly informs how he advises and advocates for contractors today. He also advised FEMA contracting officers and program officials on solicitation structure, technical evaluation criteria, debriefings, cure notices, and contract terminations, and managed FEMA's Suspension and Debarment Program, including conducting investigations and advising on enforcement actions.

This background — working inside the procurement system, not just advising clients navigating it from the outside — is a material differentiator. Nathaniel understands how decisions are made at the agency level, what arguments resonate with contracting officials, and where disputes are most likely to arise.